PHYSICS HIGH SCHOOL

The amount of heat neededto raise 2.0 kg of a substance by 80 K is 33 kJ. What is the specific heat of
the substance?

Answers

Answer 1
Answer: Q = mcθ
 
Where Q = Amount of heat in J
             m = Mass of substance in kg
              θ  = Temperature rise in °C or K
              C = Specific heat capacity in J/kgK

From given data:
Q = 33 kJ = 33 000 J, m= 2.0 kg,   θ  = 80 K,   c = ?

33000 =  2 * c * 80
33000 = 160c
160c   = 33000
       c   =  33000/160 = 206.25

Therefore specific heat capacity is 206.25 J/kgK

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Which statement best describes the equation caco3 2hcl → cacl2 co2 h2o?

Answers

it is balanced so the coefficient would be 1 and it seems to be dehydration synthesis?
To figure if this equation is balanced or not, we must determine if the reactants are the same as the products.

Ca=1                     Ca=1
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Simone created a chart to summarize the energy transformations that take place when energy from the wind is used to generate electricity.Which best completes the chart?


nuclear energy transformed to electrical energy

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Answers

Kinetic energy transformed to mechanical energy. The object that is being rotated by the wind gains kinetic energy and the motor, that is connected to the rotating object, gains mechanical energy.

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Answer:

kinetic energy transformed to mechanical energy or D

Explanation:

got it right on edge 2022!

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D. There would be four times as many extraterrestrial civilizations.

Answers

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Answers

Use an “If...then...” statement !!!!!

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Answers

Answer:

Explanation:

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B.
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C.
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D.
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Answers

I think it's 'C' but I won't know for sure until you let me see the diagram.
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